US8254925B2 - Method for simplifying the process of transmitting message - Google Patents

Method for simplifying the process of transmitting message Download PDF

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US8254925B2
US8254925B2 US11/650,189 US65018907A US8254925B2 US 8254925 B2 US8254925 B2 US 8254925B2 US 65018907 A US65018907 A US 65018907A US 8254925 B2 US8254925 B2 US 8254925B2
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counter
request message
timer
threshold value
network entity
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US20070178878A1 (en
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Yingzhe Ding
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Nokia Technologies Oy
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to messages transmitting techniques, and more particularly to a method for transmitting the lower layer message of User Equipment (UE) in Multimedia Broadcast/Multicast Service (MBMS) system in a simplified way.
  • UE User Equipment
  • MBMS Multimedia Broadcast/Multicast Service
  • Multicast and broadcast are the techniques for transmitting data from one data source to multiple targets.
  • Cell Multicast Service or Cell Broadcast Service (CBS) allow low speed data to be transmitted to all subscribers through cell shared broadcast channels, which belongs to message services.
  • IP Internet protocol
  • 3GPP International Organization for the third Generation Standardization
  • MBMS multicast and broadcast
  • PTM Point To Multipoint
  • the MBMS defined by 3GPP can not only implement multicast and broadcast of low speed messages such as plain text, but also multicast and broadcast of high speed multimedia services, which undoubtedly meets the requirements of future mobile data development.
  • FIG. 1 is a schematic diagram illustrating architecture of a radio network that supports Broadcast/Multicast service, as shown in FIG. 1 , in prior 3GPP, entity of the radio network that supports Broadcast/Multicast service is Broadcast/Multicast service server (BM-SC) 101 , and BM-SC 101 links TPF GGSN (Gateway GPRS Support Node) 102 through Gmb interface or Gi interface, one BM-SC 101 can connect with multiple TPF GGSN 102 ; TPF GGSN 102 further connects to SGSN (Serving GPRS Support Node) 103 via Gn/Gp interface, one GGSN 102 can connect with multiple SGSN 103 ; SGSN 103 can link UTRAN (Universal Terrestrial Radio Access Network) 104 of Universal Mobile Telecommunication System (UMTS) through Iu interface, and then UTRAN 104 connects with UE 106 via Uu interface, SGSN 103 can also connect with GERAN (GSM/EDGE Radio Access Network) 105 in G
  • BM-SC Broadcast/Multicast service center
  • the mobile network function entity was introduced into 3G Mobile Communication system
  • the BM-SC is the entrance to content providers, which can be used for the authorization and initiating MBMS bearer service in mobile networks and transmitting MBMS contents based on preset schedules.
  • MBMS related functions have also been added to function entities such as UE, UTRAN, GERAN, SGSN and GGSN etc.
  • MBMS consists of multicast mode and broadcast mode, wherein, multicast mode requires users to subscribe in relevant Multicast group, activate the services and generate corresponding charge information.
  • multicast mode requires users to subscribe in relevant Multicast group, activate the services and generate corresponding charge information.
  • the difference between multicast mode and broadcast mode in service requirement results in dissimilar operation flow between the two modes, as shown in FIG. 2 and FIG. 3 , FIG. 2 is a schematic flowchart illustrating operation in MBMS Multicast mode, while FIG. 3 is a schematic flowchart illustrating operation in MBMS Broadcast mode.
  • processing steps involved in MBMS Multicast service includes: Subscription, Service announcement, Joining, Session Start, MBMS notification, Data transmit, Session Stop and Leaving.
  • the UE can subscribe wanted MBMS services in Subscription step; BM-SC may announce currently available services during Service announcement step; Joining step refers to the MBMS multicast service activating process, when the UE informs the network its willingness to be a member of current multicast group and accept multicast data of corresponding services, an MBMS UE context will be generated in the network and UE that joined the multicast group to record UE information during the joining step; in Session Start step, BM-SC will prepare data transmitting, and notify the network to establish bearer resource of relevant Core Network and access network; during MBMS notification step, the UE will be notified that MBMS multicast session will start soon; during Data transmit step, BM-SC transmits the data to the UE through bearer resource established in Session Start step, wherein, MBMS
  • processing steps involved in MBMS Broadcast service are similar to these of MBMS Multicast service, however, it is unnecessary to implement Subscription process and Joining process before Session Start, and also unnecessary to implement leaving step after Session Stop.
  • MBMS service has two modes for transmitting message between UTRAN and UE: Point To Multipoint (PTM) mode and Point To Point (PTP) mode.
  • PTM MODE means that identical data will be transmitted through MBMS PTM service channel (MTCH), and available to all UE that subscribed Multicast service or were interested in Broadcast service; while PTP mode means data is transmitted via dedicated service channel (DTCH) and available only to one corresponding UE.
  • MTCH MBMS PTM service channel
  • DTCH dedicated service channel
  • radio control message In MBMS PTM transmit mode, relevant radio control message includes service information, access information, radio bearer information and Frequency Layer Convergence (FLC) information etc., which are transmitted by Radio Resource Control (RRC) through logical channel such as MBMS PTM Control Channel (MCCH).
  • RRC Radio Resource Control
  • MCCH MBMS PTM Control Channel
  • Protocol Stack structure of MCCH is shown in FIG. 4 , Protocol units of the MCCH can be listed from top to bottom as follows: RRC layer, Radio Link Control (RLC) layer, Medium Access Control (MAC) layer and Physical (PHY) layer.
  • the system introduced MBMS counting process, i.e. UTRAN employing counting process to estimate number of UEs which are interested in certain MBMS service in a cell, and the counting process differs according to different status of the UE.
  • MBMS counting process i.e. UTRAN employing counting process to estimate number of UEs which are interested in certain MBMS service in a cell, and the counting process differs according to different status of the UE.
  • RRC connection According to whether RRC connection has been established in current Mobile Communication system, status of the UE can be classified into Idle mode and RRC Connected mode.
  • the UE that has not established RRC connection with UTRAN equipment stays in Idle mode, where, the UE can only be distinguished through identifier of Non-Access Stadium (NAS) such as International mobile subscriber identity (IMSI); and the UE that has established RRC connection with UTRAN equipment stays in RRC Connected mode, where, a Radio Network Temporary Identity (RNTI) has been assigned for the UE to act as identity of the UE in common transport channels.
  • NAS Non-Access Stadium
  • IMSI International mobile subscriber identity
  • RNTI Radio Network Temporary Identity
  • the UEs in RRC Connected mode can be further classified into different status according to different layer of RRC connection and type of transport channels available to the UE, wherein, the UE in CELL_PCH status, CELL_FACH status and CELL_DCH status can be identified on the cell layer, while the UE in URA_PCH status can be identified on UTRAN Registration Area (URA) layer.
  • URA UTRAN Registration Area
  • a dedicated physical channel will be assigned for the UE in CELL_DCH status, therefore, the UE can use the dedicated transport channel or shared channel or their combination; the UE in CELL_FACH status needs downlink to continuously monitor a common transport channel (FACH, Forward Access Channel.), and uplink to assign random common channel (RACH, Random Access Channel); the UE in CELL_PCH and URA_PCH status adopts Discontinuous Reception (DRX) means to monitor a Paging Channel (PCH) through relevant PICH channel, however, there are no uplink movement under these two statuses.
  • DRX Discontinuous Reception
  • MBMS counting process is initiated by Radio Network Controller (RNC), when service Session Start step needs establishing radio bearer and RNC considers it is necessary, RNC issues notification message and sends probability factor simultaneously through the access information, after receiving the notification messages, the UE under Idle mode may acquire access information, and initiate RRC connection setup process to respond to counting process if probability factor check is passed; while the UE under URA_PCH status and CELL_PCH status will acquire access information after receiving the notification messages, and initiate cell update process to respond to counting process if probability factor check is passed; and the UE under CELL_FACH status will respond to counting process through other means after receiving the notification messages.
  • RNC Radio Network Controller
  • the method further includes following steps: generating a random number within 0 ⁇ 1 and comparing the generated random number with designated probability factor, if the random number is less than the designated probability factor, then the probability factor check is passed, otherwise the probability factor checking process fails.
  • the UE initiates the RRC connection establishment procedure through transmitting the RRC connection request message RRC CONNECTION REQUEST, when the RRC CONNECTION REQUEST message is used for the MBMS counting procedure, the RRC transmitting steps for the UE is as follows:
  • the UE After contents of RRC CONNECTION REQUEST message having been configured, the UE transmitting the configured RRC CONNECTION REQUEST message on the uplink Common Control Channel (CCCH), and setting the value of the state variable V 300 to 1; the RRC CONNECTION REQUEST message is transmitted via the RLC layer and MAC layer of Protocol Stack at the UE, after transmitting the message, MAC layer generating an indication to indicate whether the message had been transmitted successfully, and starting timer T 318 simultaneously, and setting the value of counter N 300 to 0.
  • V 300 , N 300 and T 318 are the variable names of the state variable, the counter and the timer regulated in standard protocol respectively.
  • timer T 318 Before timer T 318 expires, if the UE has received the response message transmitted from UTRAN, then it indicates that RRC connection establishment procedure of the UE succeeds, then stopping timer T 318 ; otherwise, waiting for the response message transmitted from the network until the timer expires.
  • state variable V 300 When timer T 318 expires, if the value of state variable V 300 is greater than that of counter N 300 , then the RRC connection establishment procedure of the UE fails and the UE turning into the Idle mode; besides, the UE implementing a series of operations regulated by the protocol after the UE turning from the RRC Connected mode into the Idle mode, and then finishing the entire processing procedures; otherwise, sending a new RRC CONNECTION REQUEST message on the uplink CCCH, and enabling the value of state variable V 300 to increase by degrees.
  • the prior technical schemes have the following disadvantages: at present, no matter whether MAC layer transmitting the RRC CONNECTION REQUEST message succeeds or not, the UE initiates timer T 318 in any case, however, if MAC layer informs that the RRC CONNECTION REQUEST message transmitting procedure fails, then it is unnecessary to start timer T 318 any more, the counting process will be finished in this case.
  • the present invention provides a method for messages transmission in a simplified way.
  • the technical solution of the present invention is achieved as follows:
  • a method for messages transmission in a simplified way including, transmitting a message from an User Equipment (UE) to a network through a lower layer,
  • UE User Equipment
  • the method before the processing of the lower layer indicating that the message has been transmitted successfully, the method further includes: setting an initial value of a counter, and setting a threshold value of the counter;
  • the method further includes: starting the timer if the current value of the counter is not greater than the threshold value of the counter, or ending the current procedure if the current value of the counter is greater than the threshold value of the counter;
  • the method further includes: retransmitting the message to the network, correcting the current value of the counter, and returning to the processing of the lower layer indicating that the message has been transmitted successfully if the current value of the counter is not greater than the threshold value of the counter; or ending the current procedure if the current value of the counter is greater than the threshold value of the counter.
  • the setting initial value of the counter is 1; and the preset threshold value of the counter is 0.
  • the processing of setting the threshold value of the counter includes: the network setting the threshold value of the counter, and sending the threshold value to the UE through a standardized message.
  • the processing of correcting the current value of the counter includes increasing the current value of the counter by degrees
  • the processing of correcting the current value of the counter includes descending the current value of the counter by degrees.
  • the method further includes: setting the initial value of the counter to 1 before determining whether the message has been transmitted successfully;
  • the method further includes: the UE turning into an idle mode, and implementing all operations from a connection mode to the idle mode before ending the current procedure.
  • the message includes a Radio Resource Control (RRC) message or a counting response message; the lower layer includes a Medium Access Control (MAC) layer.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the RRC message includes a RRC connection request message or a cell update message.
  • the method further includes: the UE turning into the idle mode and implementing all operations from the connection mode to the idle mode before ending the current procedure.
  • the UE can implement different operations on subsequent procedures based on indications showing success or failure in message transmit in MAC layer, the timer is not necessary to be started after failing in message transmit, and therefore the present invention can avoid unnecessary timer operation, reduce consumption of UE resources and power, and further reduce operation cost of the UE.
  • the present invention can retrench the counter and state variable setting and checking steps, therefore, simplifying relevant operation steps and reducing complexity of the procedures.
  • FIG. 1 is a schematic diagram illustrating architecture of a radio network that supports Broadcast/Multicast service
  • FIG. 2 is a schematic flowchart illustrating the service procedure in MBMS Multicast mode
  • FIG. 3 is a schematic flowchart illustrating the service procedure in MBMS Broadcast mode
  • FIG. 4 is a schematic diagram illustrating Protocol Stack structure of MCCH
  • FIG. 5 is a schematic flowchart illustrating implementing procedures of one embodiment in accordance with the present invention.
  • FIG. 6 is a schematic flowchart illustrating implementing procedures of another embodiment in accordance with the present invention.
  • FIG. 7 is a schematic flowchart illustrating implementing procedures of another embodiment in accordance with the present invention.
  • the message refers to the message which can tell current UE of RNC to receive the given MBMS services, such as a RRC message or other counting response messages, wherein, the RRC message can be a RRC CONNECTION REQUEST message or a cell update message etc.; the lower layer is a MAC layer. Following steps just take the case that transmitting the RRC CONNECTION REQUEST message, and the MAC layer generating indications showing success or failure in the message transmit as example.
  • the RRC CONNECTION REQUEST message can be transmitted once or several times, correspondingly, under the conditions of different message transmitting times, the processing procedures of the counter and the state variable may consequently differ.
  • the RRC CONNECTION REQUEST message transmitting procedure in accordance with the present invention will be described in more detail hereinafter with reference to the drawings and embodiments.
  • the RRC CONNECTION REQUEST message is transmitted only once, and the processing procedures of the counter and the state variable during the RRC CONNECTION REQUEST message transmitting procedure are implemented according to regulations of the existing standard protocol.
  • the processing procedure of transmitting the RRC CONNECTION REQUEST message in this embodiment includes the following steps:
  • Step 501 after setting contents of the RRC CONNECTION REQUEST message, the UE sending the preset RRC CONNECTION REQUEST message on uplink CCCH channel, and setting the value of the state variable V 300 to 1.
  • Step 502 to 503 if the MAC layer indicating the message has been transmitted successfully, then starting the timer T 318 , and setting the value of the counter N 300 to 0; otherwise, going to Step 508 .
  • the value of the counter N 300 can be set while starting the timer; it can also be set before Step 502 .
  • Step 504 to 505 if the UE has received the response message transmitted from UTRAN before the timer T 318 expires, then stopping the timer T 318 , showing the RRC connection establishment procedure of the UE is successful, and then ending the current procedure; otherwise, going to Step 506 .
  • Step 506 to 507 checking whether the value of the state variable V 300 is greater than that of the counter N 300 , if yes, then going to Step 508 ; otherwise, transmitting a new RRC CONNECTION REQUEST message on the uplink CCCH channel, correcting the value of the state variable V 300 , and returning to Step 502 .
  • the value of the counter N 300 corresponds to the threshold value of the state variable V 300 .
  • value setting of the counter N 300 and the state variable V 300 exclusively refer to enabling the value of the state variable V 300 is greater than that of the counter N 300 , so as to avoid retransmitting of the RRC CONNECTION REQUEST message.
  • Step 508 once the RRC connection establishment procedure of the UE fails, the UE turning into the Idle mode, and implementing a series of operations regulated by protocol after turning from the RRC Connected mode to the Idle mode, and then ending the current procedure.
  • the RRC CONNECTION REQUEST message is transmitted only once, and for this reason, no procedures on the counter and the state variable will be considered, including setting, comparing and checking of the counter and the state variable.
  • the processing procedure of transmitting the RRC CONNECTION REQUEST message in this embodiment includes the following steps:
  • Step 601 After setting the contents of the RRC CONNECTION REQUEST message, the UE transmitting the preset RRC CONNECTION REQUEST message on the uplink CCCH channel.
  • Step 602 to 603 if the MAC layer indicating the message has been transmitted successfully, starting the timer T 318 ; otherwise, going to Step 606 .
  • Step 604 to 605 if the UE has received the response message transmitted from UTRAN before the timer T 318 expires, showing the RRC connection establishment procedure of the UE is successful, and ending the current procedure; otherwise, going to Step 606 .
  • Step 606 Once the RRC connection establishment procedure of the UE fails, the UE turning into the Idle mode, and implementing a series of operations regulated by protocol after turning from the RRC Connected mode to the Idle mode, and then ending the current procedure.
  • the RRC CONNECTION REQUEST message is transmitted several times.
  • the processing procedures of transmitting the RRC CONNECTION REQUEST message in this embodiment includes the following steps:
  • Step 701 After setting the contents of the RRC CONNECTION REQUEST message, the UE transmitting the preset RRC CONNECTION REQUEST message on the uplink CCCH channel, and setting the value of the state variable V 300 to 1; at same time, the UE setting the value of the counter N 300 .
  • the initial value of the counter N 300 is set by the network, and the network transmitting the value to the UE through one standardized message, the UE then setting the initial value of the counter based on the parameters in the message, practical processing steps follow the prior procedures regulated by the standard, no details will be discussed hereinafter.
  • Step 702 to 704 if the MAC layer indicating the message has been transmitted successfully, starting the timer T 318 ; otherwise, checking whether the value of the state variable V 300 is not greater than that of counter N 300 , if yes, then starting the timer T 318 ; otherwise, going to Step 709 .
  • Step 705 to 706 if the UE has received the response message transmitted from UTRAN before the timer T 318 expires, showing the RRC connection establishment procedure of the UE is successful, and then ending the current procedure; otherwise, going to Step 707 .
  • Step 707 to 708 checking whether the value of the state variable V 300 is not greater than that of the counter, if yes, then UE transmitting a new RRC CONNECTION REQUEST message on the uplink CCCH channel, and correcting the value of the state variable V 300 , and returning to Step 702 ; otherwise, going to Step 709 .
  • the value of the counter N 300 corresponds to the threshold value of the state variable V 300
  • the state variable V 300 corresponds to the practical counting value indicating times of message transmit. If setting the value of the state variable V 300 to 1 and the value of the counter N 300 to 0, then it will become a special case of this embodiment, in this case, it corresponds to transmitting the RRC CONNECTION REQUEST message only once.
  • step 708 there are two means to correct the value of the state variable V 300 : one of which is that, if the value of the counter N 300 is the maximum of the state variable V 300 value, then correcting refers to increasing the value of the state variable V 300 by degrees, for instance, adding 1 at one time; another is that, if the value of the counter N 300 is the minimum of the state variable V 300 value, then correcting refers to descending the value of the state variable V 300 by degrees, for instance, reducing 1 at one time. In this embodiment, it refers to increasing the value of the state variable V 300 by degrees.
  • Step 709 Once the RRC connection establishment procedure of the UE fails, the UE turning into the Idle mode, and implementing a series of operations regulated by protocol after turning from the RRC Connected mode to the Idle mode, and then ending the current procedure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Communication Control (AREA)
  • Exchange Systems With Centralized Control (AREA)
US11/650,189 2005-03-28 2007-01-04 Method for simplifying the process of transmitting message Active 2028-04-24 US8254925B2 (en)

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CN200510056893 2005-03-28
CN200510056893.2 2005-03-28
CNB2005100568932A CN100344181C (zh) 2005-03-28 2005-03-28 一种简化消息发送处理的方法
PCT/CN2005/001979 WO2006102810A1 (fr) 2005-03-28 2005-11-23 Methode de simplification de procede de transmission de message

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WO2006102810A1 (fr) 2006-10-05
US20070178878A1 (en) 2007-08-02
ATE455439T1 (de) 2010-01-15
EP1761079A4 (fr) 2008-02-20
CN1794828A (zh) 2006-06-28

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